Flushing Guidance

Fond du Lac Water Utility is advising businesses and other water customers about the importance of following procedures when reopening a location where water has been stagnant in pipes.

Plumbing systems that were inactive for an extended period, such as during the shutdown for the Coronavirus (COVID-19) pandemic, can pose a health risk. Water that has not been circulated can create a potential for pathogen growth because the disinfectant in the water will dissipates over time. This stagnant water can allow disease causing pathogens to grow within the water pipes.

As some businesses start re-opening, it is recommended to follow the listed steps to maintain water quality. The purpose of building flushing is to replace ALL water inside building piping with fresh water, not just drinking water.

  • Flush hot and cold water through all points of use (e.g. showers, sink faucets, appliances, icemakers, hot water heaters, drinking fountains, etc.)
    • Flush cold water lines before hot water lines.
    • Flushing may need to occur in segments, depending on size of individual rooms or if a building contains multiple floors.
    • Flushing should start at the lowest level, the one nearest to the building’s water supply.
    • Replace all point-of-use filters, including filters in refrigerators.

More information can be found at the following links:

EPA Guidance

AWWA Resources


Office will be closed November 26 & 27, 2020 in observance of Thanksgiving.

The Water Utility Business Office (109 N Macy Street) has been re-opened to the Public, however we encourage you to reach out via phone or email, as an alternative to stopping down in person. We are limiting 1 customer in the Lobby at a time.

Social distancing measures are being practiced in our facilities.

Phone: (920) 322-3680 | Email: fdlwater@fdl.wi.gov

Water Payments may still be made via:

Phone: with FDL City Payments (920) 322-3460 (starting Aug. 1, 2020 credit card phone convenience fees will be applied )

Online: www.fdl.wi.gov/water


City of Fond du Lac

PO Box 830 Fond du Lac, WI 54936

Onsite Drop Box:

City County Government Center Located at 160 S. Macy St Main Entrance, Lot 19, or Lot 22 (off Macy St)


About Us

The City of Fond du Lac’s Water Utility is a municipally owned and operated utility providing water service to residents and businesses. Policies and rates are set by the Wisconsin Public Service Commission (WPSC). The City of Fond du Lac has over 200 miles of water main with almost 15,000 service connections providing water to residents and businesses throughout the City.